I have found this circuit
**broken link removed**
Basically it's a circuit to use the colapsing magnetic field to lit the light bulb. A 555 timer generates pulses and the lit bulb is lighted using only the colapsing magnetic field energy, while the coil is not conected to the battery (this is my understanding)
I have some doubts:
1) The light bulb is being lighted exclusively with the colapsing field? or its being lighted with the energy from the colapsing field and the energy of the electromagnet when the electromagnet is energized with the battery?
**broken link removed**
Basically it's a circuit to use the colapsing magnetic field to lit the light bulb. A 555 timer generates pulses and the lit bulb is lighted using only the colapsing magnetic field energy, while the coil is not conected to the battery (this is my understanding)
I have some doubts:
1) The light bulb is being lighted exclusively with the colapsing field? or its being lighted with the energy from the colapsing field and the energy of the electromagnet when the electromagnet is energized with the battery?